<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        //声明对象
        const school = {
            name: '张三',
            cities: ['北京','上海','深圳'],
            xueke: ['前端','java','大数据','运维']
        }
        //获取对象所有的键
        console.log(Object.keys(school));
        //获取对象所有的值
        console.log(Object.values(school));
        //entries
        //console.log(Object.entries(school));

        //创建 Map
        // const m = new Map(Object.entries(school))
        // console.log(m);

        //对象属性的描述对象
        //console.log(Object.getOwnPropertyDescriptors(school));

        const obj = Object.create(null, {
            name: {
                //设置值
                value: '张三',
                //属性特性
                writable: true,
                configurable: true,
                enumerable: true
            }
        })
    </script>
</body>
</html>